In my SL project, there is a stackpanel for basemap selection, in which there are 3 radio buttons for Streets, Topo and Imagery, respectively. It used to work well. Now, only the Streets map display initially and the selection of basemap losses its function. If I click a another basemap, the error (shown below) pops out. How can I debug on it? Thanks.
Problem found - I changed Target Name to make it becomes consistent with the map's definition. Thanks for your review.